Automatic speed change device



March 9, 1937. w. L. M DONALD 2,073,264

AUTOMATIC SPEED CHANGE DEVICE Filed Jan. 9, 1935 6 Sheets-Sheet 1 7b eng/he Z 44 {-5 5 7i) gar p \INVENTOR ATTORN EYS March 9, 1937. w. 1.. MCDONALD 2,073,264

AUTOMATIC SPEED CHANGE DEVICE Filed Jan. 9, 1935 6 Sheets-Sheet 2 ATTORN EYS March 9, 1937. w. M DONALD AUTOMATIC SPEED CHANGE DEVICE 6 She etsSheet 3 Filed Jan. 9, 1935 Fl'lllfrllllfl lllfll rlllllrlnIIII IYNVENTOR BY 5 i ATTORNEYS March 9, 1937. w. 1.. M DONALD AUTOMATIC SPEED CHANGE DEVICE e Sheets-Sheet 4 Filed Jan. 9, 1935 NTOR )il/l'fimlal ATTORN E wd m March 9, 1937. w. L. M DONALD 2,073,264

AUTOMATIC SPEED CHANGE DEVICE,

Filed Jan. 9, 1935 e Shets-Sheet 5 ZZZ Z25 1 E?" INVENTOR 176 H 163 172 v 143 1 EP171 170 182 $164 BY 183 ATTORNEY March 9, 1937. w. 1.. M DONALD 2,073,264

AUTOMATIC SPEED CHANGE DEVICE Filed Jan. 9, 1935 6 Sheets-Sheet 6 N BYdTMW ATTO R N EYS Patented Mar. 9, 1937 UNITED STATES PATENT OFFICE j 2,073,264

AUTOMATIC SPEED CHANGE DEVICE William L. McDonald, New York, N. Y. Y Application January '9, 1935, Serial No. 1,075

31 Claims.

This invention relates to automatic speed change devices for automobiles and embodies,

more specifically, an improved mechanism which operates automatically in accordance with the resultant of the combined speeds of the engine and of the car, said mechanism being flexible enough to permit the rate of automatic speed change to be varied.

Although speed change devices have been designed which operate automatically or semi-automatically in accordance with the speed of the vehicles, they have permitted of only a constant rate of automatic speed change with the result that the driver cannot vary the rate to suit his manner of driving or the conditions of the road.

It is, accordingly, a principal object of this invention to provide manually-operated mechanical means in connection with the aforesaid'speed controlled means whereby the driver may deter- 2n mine the rate at which the automatic shift from one speed to another shall take place.

A further object of this invention is 'to provide a device of the above character "which is simple in operation and capable of being incorporated in the conventional type of vehicle construction.

Other objects will appear hereinafter.

The invention will be best understood by reference to the accompanying drawings, showing the preferred form of construction in which Fig. 1 is a side view of the parts of the speed controlled means and the manually operated means connected therewith, associated with the driving and driven shafts of the automobile. The

car is in neutral position with the engine idling.

Fig. 2 is a side view of the same with some of the parts removed. The car is in the inter-' mediate speed position.

Fig. 3 is a side view of the same with some of the parts removed. The car is in the advanced speed position.

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 1.

Fig. 5 is a sectional view with some of the parts 5 removed takenon the line 5-5 of Fig. 1.

Fig. 6 is a sectional view with some of the parts removed taken on the line 6-6 of Fig; 1.

Fig. '7 is a sectional view taken on the line of Fig. 1.

5 Fig. 8 is a cross-sectional view of the electrical contact device through which the speed controlled means electrically operates the members causing the gears to be shifted.

Fig. 9 is a sectional view taken on the line 55 3-3 of Fig. 8.

(Cl. IL-336.5)

and a diagrammatic representation of said hold-- ing device. I.

Fig. 15, Fig. 16 and Fig. 1'1 disclose the releasing means of Fig. 14 in different positions for the purposes of this invention.

Fig. 18 is a cross-sectional side view of the means for bringing the gears to neutral before 18 shifting.

Fig. 19, Fig. 20 and Fig. 21 are detail views of a part of the structure of Fig. 18 in different positions for the purposes of this invention.

Fig. 22 is a top view in assembled relationship a. of the structures shown inFigs. 14, 15, 16, 1'7, 18,

19, 20 and 21.

Fig. 23 is an end view of the structure disclosed in Fig. 22.

Fig. 24 isa diagrammatic view of part of the 25 device.

Referring to the drawings, more particularly to Figs. 1, 2, 3, 4, 5, 6 and 7 thereof, I indicates a housing. Mounted in housing I, in parallel relationship, are a shaft 2 connected by some so suitable means as a bevel gear or the like with the engine driving shaft and a shaft 3 connected in the same manner with the car driven shaft; shaft 2 is rotatably journaled in bearings I and 5 and shaft 3 is rotatably Journaled in bearings 33 6 and 1 provided in housing I.

8 and 9 are two centrifugal governors mounted on shaft 2 and shaft 3 respectively. Upper arms l0 and II of governor 8 pivot in sleeve [2 which is rigidly mounted on shaft 2 and revolves with 40 it. Similarly upper arms I3 and H of governor 9 pivot in sleeve l5 rigidly mounted on shaft 3. Lower arms l6 and ll of governor 8 pivot in sleeve l8 which is slidably mounted on shaft 2; likewise lower arms I9 and 20 of governor 9 piv- 46 ot in sleeve 2! which is slidably mounted on shaft 3; sleeves l8 and 2| are afllxed to collars 22 and 23 respectively in which are set curved racks 24 and 25 loosely mounted on shafts 2 and 3 respectively but restrained from revolving with them; curved 50 racks 24 and 25 engage pinions 26 and 21 respectively, said pinions being eccentricaily and rigidly mounted on shafts 28 and 29 respectively, said shafts 28 and 29 being joumaled in suitable bearings in housing i as 69 and 10, shown for shaft 29 in Figure 4. The movement of the curved racks 24 and 25 and pinions 26 and 21 give shafts 26 and 28 a rotary motion proportional to that of shafts 2 and 3.

8 On extensions of shafts 28 and 28 are mounted eccentrics 38 and 3|, each grooved around the periphery to receive eccentric bands 32 and'38 respectively; band 32 has an extending portion 34, as has band 33 an extending portion 36; exten- 10 sion portion 84 is connected to lug 36 on bar 38 which has slot 38; similarly extension portion 35 is connected to lug 31 on the said slotted bar 38.

Slotted bar 38 has a central lug 48 containing a pin 4| which rides in the slot 42 of bar 43 which 15 has a position parallel to and midway between shafts 2 and 3; bar 43 is mounted at 44 and 45 in the housing I (see Fig. 4).

In front of bar 38 and in a plane parallel to it is a second bar 46 having aslot 41 which is so ar- 2 ranged as to always move parallel to itself and perpendicular to bar 43. This is accomplished as follows:At either end of bar 46 are affixed racks 48 and 48 which mesh with pinions 58 and respectively which are rigidly mounted on bar 52.

25 Rack 48 slides in slotted support member 53, while rack 48 likewise slides in slotted member 54; these supports 53 and 54 are affixed to housing Shaft 52 is rotatably joumalled in bearings 55 and 56 provided in housing I.

39 Bars 38 and 46 are connected by a pin 51 mounted on some suitable means as a block to slide in the slot 41 of the bar 46, said pin 51 extending through slot 38 in bar 38. Because of pin 51, bar 46 accompanies bar 38 in its upward or 35 downward movement. It will be seen that when pin 51 is moved horizontally, the bar 46 will be raised or lowered to the point where the two slots .38 and 41 coincide because of pin 51. The position of pin 51 is controlled by member 58, having 40 slot 58 wherein is held said pin 51; member 58 is attached to a rod 68 sliding in sleeve 6| mounted at 62 and 63 in housing l, as shown. Rod 68 is manually controlled by the driver through an extension to the steering column or cowl (not shown 45 in the drawings).

On bar 46 is mounted a rack 64 which meshes with pinion 65; pinion 65 is rigidly mounted on shaft 66 which is rotatably journalled in bearing 61 in housing (see Figs. 5 and '1) and is further- 50 more provided with support 68 affixed to said housing I. By means of rack 64 and pinion 65, shaft 66 will be given a rotary motion which is proportional to the resultant of the speed of rotation of shaft 2 and the speed of rotation of 55 shaft 3.

A hook member 1| (see Fig. 1; also Fig. '1 where member 1| is shown in top view) is provided to hook over bar 46 and prevent it from rising to second gear position, when reverse gear is desired. 60 The shank of 1| is so pivoted at 12 that member 1| normally pivots away from bar 46 and falls back against housing However, member 1| may be caused to pivot at 121 and turn in the direction of bar 46 when wedge 14 is pushed against 65 resistance between housing and the shank or side of member 1| The hook of member 1| is of such a length that when bar 46 is down to neutral, said hook member being so caused to pivot, will pass over it and allow bar 46 to rise within 70 the hook to the first, or, in this case, reverse gear position but not further (i. e., to second gear position). Wedge 14 is mounted on shaft 16 which is slidably mounted in block 16 fixed to housing Wedge 14 normally is resiliently held 75 against block 16' by pressure spring 15 intermediate between block 16' and stop 16' affixed to shaft 16; shaft 16 extends extraneous to housing I on the floorboard of the car for operation as by a heel button. When the pressure on shaft 16 and against spring 16 is released, the tension in spring 15 will cause shaft 16 to slide back and carry wedge 14 from between housing and the shank or side of member 1| to its normal posiv tion against block 16.

The electrical contact device, Figs. 8 to 13, is constructed as follows: 11 designates a housing ailixed to housing to contain said device (see also Fig. 4). Also affixed to said housing is a semi-circular shaped member 18 provided with openings 18 which are spaced to represent the points of shifting gears.

On the extension of shaft 66 is rigidly mounted a disc 88 having a hub 8| from which projects a lug 82; a second lug 831s located near the periphery of wheel 88; both hub 8| and lug 83 project on the inner side. Facing disc 88, a rotating cup-shaped member 84, having a projecting hub 86 with lug 86 thereon, is loosely mounted on shaft 66. Between disc 88 and member 84 and surrounding their hubs 8| and 85 is a circular leaf spring 81 whose ends engage lugs 82 and 86. Leaf spring 81 is provided to keep disc 88 and member 84 normally with relation to each other, in a neutral position.

On the inner surface of member 84, on the flange thereof, is afilxed a double pawl 88 having hooked extension members 88; the ends of double pawl 88 pass through openings 88 in the rim of member 84 and through openings 18 in member 18. There are only two openings 88 and they are so spaced as to cover two openings 18. The hooked extension members 88 are provided to engage the lug 83 on the inner side of disc 38.

Mounted on the outer side of the flange of cupshaped member 84 is a metal contact plate 8| extending sufficiently far around said flange to cover the various gear shifts. A projection 82 extends from plate 8| across the outer fiat surface of member 84, to a position where it will make a contact to be hereinafter described. Also mounted on the outer side of cup-shaped member 84, but directly opposite to the contact plate 8|, is a metal contact plate 83 having four projections 84 extending over the outer fiat surface of member 84 sumciently far to make contacts to be later described. Contact plate 83 and extensions 84 are so spaced that contact through one of the four contact plates 83 will be made when member 84 is in its midway shifting position.

Three openings 85 are provided in the flange of cup-shaped member 84, and are so placed as to be opposite the midpoints between openings 18 in member 18. These openings 85 are provided to engage a pawl 86 which is rigidly mounted on a rod 81 rotatably mounted in and extending extraneous to housing 11 to run beneath the gear shift rods I38 and I52 (see Fig. 14 showing position of rod 81 under rod I38). mounted, as in conjunction with a spring 81' that it will act to keep pawl 86 pressed against the flange of member 84, so that, when member 84 turns, pawl 86 will slip into openings 85 therein. 88 (see Fig. 14) is a lever or extension member rigidly mounted on bar 81 as shown directly below the gear shift rod I38 operating second and third gear. There is another corresponding extension member 88 (not shown) also rigidly mounted on rod 81 but directly beneath gear shift rod I52 operating first and reverse gears. When either member 88 is pushed down, it will rotate Rod 81 is so.

rod 81 so that pawl 88. rigidly mounted thereon will be withdrawn from whichever opening 88 it happens to be engaging in cup-shaped member 84. The first opening 88 is so shaped or sloped that lug 98 will, on the decreasing speed rotation of member 84, slide readily from that opening 98 to the flange-of member 84, without the operation of the release mechanism.

Next to member 84 there is also loosely mounted on shaft 88 another cup-shaped member 99 having a square hub I00 and cone-shaped hub IOI between members 99 and 84 is 'a coil spring I02. A friction gear I08 rides on the cone-shaped hub MI and tends to move with it. I04 is a gear keyed to shaft 88 and complementary. to gear I08. Between friction gears I04 and I08 are spur pinions I08, mounted on projections of housing 11, and meshing on either side with members I04 and I08. By this arrangement, cup-shaped member 99 is caused to move in an opposite direction to cup-shaped member 84.

Members I08, I01 and I08 (see Figs. 8 and 13) are contact pins, slidably mounted on cup-shaped ,member 99, making contact with member 92;

member I09 is a contact link between pin I08 and binding post II2, said link being slotted so as to freely slide over the neck of said post. Slidably mounted on post H2 is a contact plate II8 normally in contact with contact member II4 leading to the mechanism operating low gear (see Fig. 13). Plate II8, however, may be slid by means of rod H5, journalled in bearing H8 in housing 11, out of contact with member I I4, and into contact with member II1 leading to the mechanism operating reverse. Rod H5 is operated by the driver at reverse and is connected as by some suitable means as a Bowden wire to shaft 18 so that it may be actuated as by the same heel button. H0 is a slotted link between pin I01 and binding post II8 leading to second or intermediate gear and III is a slotted link between .pin I08 and binding post II9 leading to mechanism operating third or high gear. The binding posts H2, H8 and H9 are aflixed to housing 11.

Contact from the clutch pedal is made through binding post I20 to brush member I2I which contacts plate 9I on member 84. Contact to the clutch opening mechanism is made through one of the extensions 94 of plate 93, contact member I22 and binding post I23. Contact from the battery is made through binding post I24 to brush member I25 which contacts plate 98.

The operation of the above electrical contact device is as follows:-.-The positions of disc 80, cup-shaped member 84, pawl 88 and its extension members 89, lug 83 on disc 80, leaf spring 81 and lugs 82 and 88 as shaft 68 begins to revolve because of the movement of bar 48 is shown in Fig. 9. Disc is held by the forward end of pawl 88. As shaft 88 continues to turn, carrying disc 80 with it, lug 82 on disc 80 and lug 88 on member 84 gradually separate expanding leaf spring 81 until an extension member 89 on pawl 88 is engaged with lug 83 on disc 80 and pawl 88 is released from opening 19 in member 18 (see Fig. 10) When thus released, cup-shaped member 84 because of the tension in spring 81, tends to return to its normal position with respect to disc 80. But this movement is checked halfway by pawl 98 dropping into the first of the openings situated in the opposite side of the flange of member 84 and oppositethe midway point between two of the openings 19 in member 18 (see Fig. 11).

In this--position,'member'84 makes the contact which sets up a circuit from the battery through post I24, brush member I28, plate 88, projection 94 thereof, contact member I22 and through binding post I28 to the mechanism op erating to open the clutch. As the clutch isopened, a mechanism (see Figs. 18, 19, 20 and 21) to be hereinafter described, brings the gears to neutral before any shifting impulse is .applied. When the clutch is entirely open, it makes a contact (see Fig. 24) to be hereinafter described,

which setsup a circuit through binding post I28,

brush member I2I, plate 8|, projection 92 thereof, contact pin I08, contact link I08, binding post II2, contact plate H8 and contact member II4 to mechanism operating low gear. 'As the rod controlling this set of gears moves, it cooperates with lever or extension member 88 on rod to turn said rod 91 to release pawl 88; and cup-shaped member 84 because of tension of leaf spring 81, passes to its normal position with respect to disc 80. The electrical contacts are then broken, the clutch is closed, and pawl 88 engages the next. 19 space ready for the next shift to intermediate or second gear. The parts will be found to have taken the position disclosed in Figure 12.

In effecting the second gear shift, the mem- I bers operate in the same manner, but as disc 80 has advanced, andwith it the cup-shaped member 84, the contact to open the clutch will be made through the next 94 projection of plate 98 on member 84; pawl 98 will engage the second or middle opening 95 in member 84 and the gearoperating circuit will now be made through binding post I20, brush member I2I. plate 9|, projection 92 thereof, contact pin I01, contact link IIO through binding post II8 to the mechanism operating second gear. High gear is obtained with pawl 98 engaging the third opening 98 in member 84 and with contact through contact pin I08, contact link III through binding post II9 to the mechanism operating high gear.

During the advance in speed, disc 80 and member 84 turn in one direction while member 98, because of the action of spur pinions I 05 rotates in the opposite direction. In decreasing speed disc 80 and member 84 turn in a direction the reverse of that in increasing speed until lug 88 on disc 80 releases the opposite end of pawl 88 and pawl 98 engages the third opening 95 in member 84. This would bring member 84 to a position where contact member 92 would connect again with direct drive pin I08, with the result that there would be no action as gears would be already in direct drive.

To correct this result gear I04 and pinions I05 are provided to turn member 99 in the direction opposite to that of disc 80 and member 84. As the relative motion is the same but opposite, member 99, carrying contact pins I06, I01 and I08, will bring contact pin I01, leading to second gear, to take the position previously held by contact pin I08, leading to direct drive, with the result that member 92 contacts to second gear. See Fig. 13.

The mechanism by which lever or extension member 98 is operated to release pawl 98 from openings 95 in member 84 is shown for one of the two gear shift rods in Figs. 14 to 17. See also Figs. 22, 23 and 24 for assembled relationship. I21 and I28 designate housings for third gear and second gear cylinders respectively; mounted at bearing I29 in housing I21, is gear shift rod I80 having plungers I8I and I32 mounted thereon. I88 is a pawl Divotally mounted on rod I80 at I84; I85 is a pawl also pivotally mounted on rod I88 at I86. The pawls I33 and I-35 normally rest, as shown, on stud I31 on rod I30. Beneath pawls I88 and I35 is a T-shaped lever arm I38 having cross bar I39; lever arm I38 is pivotally mounted on rod I 40. Below lever arm I38 is a yieldable head piece I4I around the shaft of which is wound coil spring I42; member. I is mounted on support I43. As shown the shaft of I contacts extension member 98 In Fig. 22 the members operating in connection" with the low gear and reverse cylinders corresponding to members I29 to I31 inclusive and I39 in third gear and second gear cylinders are designated I49 to I59 inclusive and I6I. In Fig. 23, the members operating in connection with the low gear and reverse cylinders corresponding to members I21, I30, I33, I34, I38, I39, I, I42 and I48. in the high gear and second gear cylinders are designated I49, I52, I55; I56, I60, I6I, I62, I63 and I64 respectively.

The pawls I33 and I35 operate to release pawl 96 from openings 95 in the following manner: When gear shift rod I 30 is carried from a position as in Fig. 14 to a position as in Fig. 15 (second gear shift) pawl I35 comes in contact with lever arm I38 and causes it to take. the position shown and to depress the yieldable head piece I. The pressure depresses extension 98 causing bar 91 to be turned and to carry with it pawl 96 withdrawing said pawl 96 from opening 95. The length of lever arm I38 is such that when the gear is entered lever I38 passes by lug I35 and resumes its normal vertical position as shown in Fig. 16. When the shifting rod I30 is carried back to neutral, lug I35 is raised by the end of lever arm I38 and passes over said lever arm and all parts return to the position shown in F ig. 14. When gear shift rod I30 is carried by-the third gear shift in the opposite direction, lug I33 will cause lever arm to take a position to depress yielding head member I, with the result described above. It is to be understood that for the cylinders operating second gear and reverse the movements of gear shift rod I52 will cause the corresponding members mounted thereon to act in the same way with the result that yieldable head member I62 will depress the corresponding extension member 98 to turn bar 91.

' The mechanism by which the gears are brought to neutral before any shifting impulse is applied is shown for second and third gears in Figs. 18

to 21. See also Figs. 22, 23 and 24 for assembled relationship with third gear and reverse. Member I65 is a lug mounted on gear shift rod I30 having a projection to engage slotted T-shaped lever arm I66 having cross-piece I61; said lever arm I 66 is pivotally mounted on rod I 40. Opposing cross-piece I61 is a T-shaped arm I68 near the neck of which is shown the end of a bar I69; said arm I68 is held in a vertical position on a housing I by a bolt I1'I which extends extraneous to housing I 10 and which when arm I68 is raised will slide through said housing I10. Between the nut I12 on said bolt HI and housing I10 is a coil spring I13. On extension I14 from housing I28 is mounted one end of rod I; on this end of rod I15 is rigidly mounted a trigger-flnger I16 with pivoted pawl I11 so placed as to raise member I68 by striking upward against bar I69 joined thereto. Members cooperating with the low-reverse gear shift rod I52, corresponding to members I65, I66, I61, I68, I1I, I12, I13, I14, I16 and I11 are designated I18, I19,

I80, I8I, I82, I88, I84, I85, I86 and I81 respectively and are shown in Figs. 22 and 23.

Bar I88 extends between the neck of T-shaped arm I88, acting in relation to gear shift rod I38 and the neck of T-shaped arm I, acting in rela'tion to gear shift rod I52. Similarly bar I18 extends between trigger-finger I 18 and triggerfinger I86 and is mounted near the latter triggerfinger I66 on extension I85 of housing I50. By lever arm I 88 rigidly mounted on bar I15 at its center, said bar I15 is caused to rotate so as to raise trigger-fingers I18 and I 86. Lever arm I88 is pivoted on head I 88 of rod I90 connected with the clutch release as shown in Fig. 24.

The operation of the above described device for one of the gear shift rods I30, operating direct drive and second gear, is shown in Figs. 18 to 21. Because of the movement of gear shift rod I30 into gear position, T-shaped lever arm I66 will be caused to pivot on rod I 40 with one end of its cross piece I 81 resting on the cross piece of arm I68. See Figs. 18 and 19. When the clutch is released the push on rod I90 will cause lever arm I 88 to rotate rod I 15 so that the point I11 of trigger-finger I16 will lift bar I69 and with it member I68. This upward movement will cause levr I66 to pivot back on rod I40 and take the vertical position shown in Fig. with the result that gear shift rod I will be brought back to neutral position. When lever arm I66 reaches the position shown in Fig. 20, point I11 of trigger-finger I16 turns on its pivot and being of proper length to allow of its slipping past bar I89, and arm I66 returns to the position shown in Fig. 21. When the clutch is closed rod I90 is pulled back, with the result that trigger-finger I16 and its point I11 return to the position shown in Fig. 18. When a gear is shifted, lever arm I66 pivots on bar I40 to a position as shown in g. 18. It is to be understood that gear shift rod I52 operating low gear and reverse is brought back to neutral position in the same manner by the effect of the pushing action of rod I90, the turning of lever arm I88, and the resulting rotation of rod I15 -on trigger-finger I 86 with point I81, causing said point I81 to lift bar I69 and with it member I8I. The rise of member I8I will cause member I19 to pivot back on rod I40 and resume its vertical position so as to bring gear shift rod I52 to neutral.

In Fig. 24 which is a diagrammatic view of part of the system showing the relationship of theelectric circuits, vacuum tank and vacuum lines, the clutch and gear shift cylinders which are situated between the driving and driven shafts (not shown), I9I designates the clutch pedal having lever arm I92 which pivots at I93 because of the movement back and forth of cylinder rod I94 aflixed to arm I92 at I95. At I96 on lever arm I92 is afllxed rod I90. Lever arm I92 may be provided with a dash-pot at I91 or other well-known device to ease the clutch in to avoid clashing. On clutch pedal I9I is mounted a contact plate I98 which, when the clutch pedal has completed its stroke, bridges contact I 99 connected from the battery 200 by lead 20I and contact 202 connected to extension 92 of contact plate 9| by way of lead 203. 204 is the vacuum cylinder actuating rod I94 to open and close the clutch.

205 is the lead from the battery wire 20I through binding post I24 to brush member I25. From binding post I23, contact members H1 and H4, and binding posts H8 and H9, are leads 206, 201, 208, 209, 2I0 to solenoids 2H, 2, 2I3, 2I5,

aovaaee 2l2 which operate to open and close the valves 2 I6, 2I9, 2|8, 220 and 2|1 of vacuum lines 22I, 224, 223, 225 and 222 leading to the clutch, reverse, low gear, second gear and third gear cylinders respectively. The said vacuum lines 22I, 224, 223, 225 and 222 all lead into the manifold chamber 226 of vacuum tank 221 which is provided with an inlet valve 228 connected with the manifold of the engine (not shown). From the manifold chamber 226'to the main tank 221, there is a main outlet valve 229 which is opened and closed by solenoid 238 within tank 221. From solenoids 2|I, 2|4, 2I3, 2|5 and 2l2 is lead 23| to solenoid 238 and from the battery 288 is lead 232 to solenoid 238.

The operation of the foregoing mechanism will be apparent from its description. When the engine is started, driving shaft 2 revolves and turns with it, governor 8, which, through its raising action on rack 24, turns pinion 26 which carries shaft 28 with it, causing eccentric 38 to ascend. Through extension 34 of band 32 on eccentric-38 the nearer end of the bar 38 is then caused to be raised. If the manual control member 58 is set over the drive shaft 3, there will be no motion of the carbecause bar 46 will not be moved whatever the speed of the engine. The speed controlled parts and the members of the electrical contact device will have the position shown in Fig. 1 and Fig. 9, respectively. Therefore, to set the car in motion it will be necessary for the driver to draw the manualcontrol member 58 by means of bar 68, further in'toward bar 43 along bar 46. This will result in bar 46 being raised parallel to itself, and in consequence rack 64 will be carried up to turn pinion 65 and with its shaft 66 with disc 88 mounted thereon. Said disc 88 will turn until it reaches the position shown in Fig. 10. Cup-shaped member 84 which has been restrained by the end of pawl 88 engaging opening 19 in member 18, as in Fig. 9, is then released. Tending to resume its normal position with respect to disc 88, member 84 is held midway in its contact position by pawl 96 engaging first opening 95 in its flange as above described. At this point a circuit will be established from the battery 288 through lead 285, binding post I24, brush member I25, plate 93 and projection 94 thereof on member 84, contact member I22, binding post I23, lead 206 to energize solenoid 2 to open valve 2I6 of vacuum line 22I, leading from vacuum cylinder 284 operating to release clutch |9I by drawing in cylinder rod I94. At the same time that solenoid 2| I is energized current is carried therefrom by lead 23I to energize solenoid 238, within the main vacuum tank 221, to open the main outlet valve 229.

As clutch pedal |9| descends, rod I98 is pushed in to bring the gear shift rods to neutral position as above described. When clutch pedal |9I completes its stroke, contact plate I98 thereon bridges contacts I99 and 282 and a circuit is set up from the battery 200 through lead 20 I contact member I99, contact plate I98, contact member 282, lead 283, binding post I28, brush member I2I, plate 9| and projections 92 thereof, contact pin I86, contact link I89, binding post 2, contact plate II3, contact member II4, lead 288 to energize the solenoid 2 I3 to open valve 2 I8 of vacuum line 223 leading from the vacuum cylinder operating gear shift rod I52 to mesh the low gears. The movement of rod I52 in meshing the low gears will cause pawl 96 to be released from the first opening 95 as above described. Member 84 will then advance to its normal position with respect to disc 88; the electric contacts will be broken and member 84 will be restrained by pawl 88 engaging the next opening 18 ready for the shift to second gear.

As the car starts to move in low gear, drive shaft 3 begins to revolve and turns with it, governor 9 which raises rack 25 and consequently turns pinion 21 and eccentric 3|, causing the nearer end of bar 38 to gradually rise toward the level of its other end as in Fig. 2. Because of pin 51, bar 48 will accompany bar 38 in its rise but always parallel to itself. Shaft 66 will therefore turn further and carry disc to the position where it acts to release member 84 and allows it to assume its contact position. The clutch will be released and the gears brought to neutral as described above and the clutch will make the circuit from the battery 208 but since projection 92 on plate 9| on member 84 is now contacting pin I81 the circuit will be completed through contact link 8, binding post I I8, lead 289 to energize solenoid 2I5 to open valve 228 of vacuum line 225 leading from vacuum cylinder operating gear shift rod I38 to mesh second gear. Pawl 96 will be released as heretofore described, member 84 will assume its normal position and be held ready for the shift to high gear which will be effected in the same manner by bars 38 and 46 rising to the position as shown in Fig. 3. The circuits may easily be traced on Fig. 24.

In decreasing speed, as above noted, disc 88 turns in its reverse direction releasing the opposite end of pawl 88. Cup-shaped member 84 then tends to return to the normal position with respect to disc 88 but is checked halfway by pawl 96 engaging the third opening in member 84. But, as above described, because of the counter movement of member 99, contact member 92 contacts pin I81 leading to second gear. Lug 96 is then released by the movement of gear shift rod I38 operating upon extension lever 98.

If the speed continues todecrease, disc 88 will continue to turn in its reverse direction releasing pawl 88 and lug 96 will engage the second opening 95 in member 84 with the result that contact member 92 will contact pin I86 leading to low gear. Lug 96 will then be released by the movement of gear shift rod I52.

Upon the speed further decreasing until the car is brought to a stop, disc 88 will turn further in its reverse direction releasing pawl 88. Cup-shaped member 84 will tend to return to normal position with respect to disc 88. Lug 96 will then enter the first opening 95 but because of the sloped shape of said opening 95 will slide out of it allowing cup-shaped member 84 to resume its normal position with respect to 88. The sloped shape of the first opening 95 is necessitated by the fact that at this point contact member makes no pin contact which would result in a gear shift rod movement to release lug 96. However, at this point the clutch opening contact will be made by which the gears are brought to neutral.

The operation of the device in reverse has been described above (see Fig. 24 for circuits).

It will be apparent that the driver may regulate the rate at which the gear shifts succeed one another by sliding bar 68 and member 58 amxed thereto, to draw pin 51 horizontally along the slot of bar 46. The further said pin 51, connecting bars 38 and 46, is drawn toward the center vertical bar 43, as in Figs. 2 and 3, the more will bar 46 be raised or lowered so that the slot in bar 46 will tend to more closely coincide with the slot in bar 38. Therefore the further toward vertical center bar 43, pin 51 is drawn the less time, with any degree of the speed of engine or car, will bar 46 take to respond to the upward or downward movement of bar 38 which is raised or lowered in accordance with the resultant speed of the engine and drive shafts. When the driver wishes to go into reverse, rod

10 H5 is actuated to. slide contact plate Ill, mounted on post 2, out of contact with member H4 leading to low gear and into contact with member II'I leading to reverse. As shown above, in order to keep bar 48 from rising from its first gear position (now contacted to reverse) and thus carry the shift to second gear, the heel button (not shown) at reverse is pressed to actuate rod 18 so that it will cause hook member II to hook over bar 46 when down to neutral; bar 46 20 within the hook will then rise not higher than first gear (now reverse) position. After the reverse motion has started, the control button is released; rod 16 slides back because of spring 15 to its normal position allowing wedge 14 to return from between the side of shank of hook member H and housing I. When bar 46 goes down to neutral (below hook of hook member 1|), said hook member ll falls out of contact with bar 48 back against housing I. Reverse position will then be automatically cleared and bar 48 will rise to its-position actuatin low gear and on up to the other gear positions.

While the invention has been described in connection with the specific construction shown in the accompanying drawings, it is obvious that changes in construction, form and arrangement of parts may be made without departing from the scope of the invention. The actual shifting may be made by compressed air or electric solenoids o and other changes may be made. I therefore do not want to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

I claim as my invention:

1. In a device of the class described, the combination of a first shaft, a second shaft, a clutch, clutch release mechanism and speed change mechanisms between said shafts, means for automatically actuating-said mechanisms in accordance with the speed of rotation of the first shaft and with the speed of rotation of the second shaft and means to regulate the automatically actuating means so as to vary the rate of operation of the speed change mechanisms.

2. In a device of the class described, the combination of a first shaft, a second shaft, a clutch, clutch release mechanism and speed change mechanisms between said shafts, means for automatically actuating said mechanisms in accordance with the speed of rotation of the first shaft and with the speed of rotation of the second shaft and manually operated means to regulate the automatically actuating means so as to vary shaft and means to regulate the actuating means amazes so as to vary the rate of-operation of the -speed 7 change mechanisms.

4. In a device of the class described, the combination of a driving shaft, a, driven shaft, a clutch, clutch release mechanism and speed change mechanisms between the said shafts, means for actuating said mechanisms in accordance with the speed of rotation of the driving shaft and with the speed of rotation of the driven shaft and manually operated means to regulate the actuating means so as to vary the rate of the operation of the speed change mechanisms.

5. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism and speed change mechanisms between said shafts, means for automatically actuating said mechanisms in accordance with the speed of rotation of the driving shaft and with the speed of rotation of the driven shaft and means to regulate the automatically actuating means so as to vary the rate of operation of the speed change mechanisms.

6. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism and speed change mechanisms between said shafts, means for automatically actuating said mechanisms in accordance with the speed of rotation of the driving shaft and with the speed of rotation of the driven shaft and manually operated means to regulate the automatically actuating means so as to vary the rate of operation of the speed change mechanisms.

'7. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, means for automatically actuating said mechanisms in accordance with the speeds of rotation of the driving shaft and the driven shaft, and means to regulate the automatically actuating means so as to vary the rate of automatic gear shift.

8. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, means for automatically actuating said mechanisms in accordance with the speeds of rotation of the driving shaft and the driven shaft, and manually operated means to regulate the automatically actuating means so as to vary the rate of automatic gear shift.

9. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release gears and gear shift mechanisms between said shafts, a speed controlled means, means for regulating said speed controlled means; means operated by said speed controlled means for operating the clutch and the several gear shift controlling mechanisms, said operated means normally operating in a progressively forward speed position, means cooperating therewith to move said means into a reverse speed position, means to prevent said speed controlled means from advancing to effect shifts to higher gears when reverse gear is engaged, means to move said operated means to a decreasing speed position, and means cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made.

10. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release, gears and gear-shift-mechanisms between said shafts, a speed controlled means, manually operated means for regulating ao'zases -7 said speed controlled means; means operated by said speed controlled means for operating the clutch and the several gear shift controlling mech-- anisms, said operated means normally operating in a progressively forward speed position, means cooperating therewith to move said means into a reverse speed position, means to prevent said speed controlled means from advancing to effect shifts to higher gears when reverse gear is enl0 gaged, means to move said operated means to a decreasing speed position, and means cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made.

11. In a device of the class described, the combination of a driving shaft, a driven shaft, a

clutch, clutch release gears and gear shift mechanisms between said shafts, a speed controlled means, manually operated means for regulating said speed controlled means, electrical contact means operated by said speed controlled means for operating the clutch release and the several gear shift controlling mechanisms, a means for holding said electrical contact means in position to make proper clutch release and gear shift operat- 2 ing mechanism contacts, a means cooperating with said gear shift operating mechanisms to release said holding means, said operated electrical contact means normally operating in a progressively forward speed position, means cooperating 3 therewith to move said means into a reverse speed position, means to prevent the speed controlled means from advancing to effect shifts to higher gears when reverse gear is engaged, means to move said electrical contact means into a decreasing speed position, and means cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made.

12. In a device of the class described, the combination of a driving shaft, a driven shaft, a

I clutch, clutch release, gears and gear shift mechanisms between said shafts, a speed controlled means, manually operated means for regulating said speed controlled means, clutch release and gear shift mechanisms, electromagnetic means for operating said mechanisms to effect a particular engagement, circuits to said electromagnetic means and including a source of current; electrical contact means operated by the said speed controlled means to actuate the electromagnetic means through the respective circuits, 9. means for holding said electrical contact means in position to make proper contacts to actuate the electromagnetic means to operate the clutch release and proper gear shift mechanisms, a means cooperating with said gear shift mechanisms to release said holding means, said operated electrical contact means normally operating in a progressively forward speed position, means cooperating therewith to move said means so into a position to make a reverse speed contact,

means to prevent the speed controlled means from advancing to effect shifts to higher gears when reverse gear is engaged, means to move said electrical contact means into a position to make decreasing speed contacts, and means cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made.

13. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release, gears and gear shift mechanisms between said shafts, a speed controlled means, manually operated means for regulating said speed controlled means, electromagnetic means for operating said clutch release and gear shift mechanisms, mechanisms to effect release of the clutch or particular gear engagements, circuits to said electromagnetic means and including a source of circuits; electrical contact means operated by the said speed controlled means to actuate the electromagnetic 6 means, through the proper circuits, operating the clutch release mechanism and to actuate, after the clutch has established contact, the electromagnetic means, through the proper circuits,

the electromagnetic means operating the various l0 gear shift mechanisms; a means for holding said electrical contact means in position to make the proper contacts, a means cooperating with said gear shift mechanisms to release said operated electrical contact means manually operating in a progressively forward speed position, means cooperating therewith to move said means into a position to make a reverse speed gear contact, means to prevent the speed controlled means from advancing to effect shifts to higher gears 20 when reverse gear is engaged, means to move said electrical contact means into a position to make decreasing speed contacts, and means cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made.

14.1n a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, a speed controlled means comprising centrifugal means one mounted on the driving shaft and one on the driven shaft, regulating means adapted to control means for operating the clutch release and the several gear shift operating mecha nisms, means for regulating said centrifugal regulated means, said means operating the clutch release and gear shift mechanisms normally operating in a progressively forward speed position, means cooperating therewith to move 40 said means into a reverse speed position, means to prevent said centrifugal regulated means from advancing to effect shifts to higher gears when reverse is engaged, means to move said means operating the clutch release and gear shift 45 mechanism to a decreasing speed position, and means cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made.

15. In a device of the class described, the Q50 combination of a. driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, a speed controlled means comprising centrifugal means, one mounted on the driving shaft and ..55 one on the driven shaft, regulating means adapted to control means for operating the clutch release and the several gear shift operating mechanisms, manually operated means for regulating said centrifugal regulated means; means, 00- so operating with said means operating the clutch release and gear shift mechanisms, which normally operates in a progressively forward speed position, to move said means into a reverse speed position; means to prevent said centrifugal regu- :65 lated means from advancing to effect shifts to higher gears when reverse is engaged, means to move said means operating the clutch release and gear shift mechanisms to a decreasing speed position, and means cooperating with the *70 clutch release mechanism to bring gears to neutral before a shift of gears is made.

16. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear 75 shift mechanisms 'between said shafts; a speed controlled means comprising centrifugal means, one mounted on the driving shaft and one on the driven shaft, regulating means adapted to control electrical contact means for operating the clutch release and the several gear shift controlling mechanisms, manually operated means for regulating said centrifugal regulated means, a means for holding said electrical contact means in-position to make proper clutch release and gear shift operating mechanisms, contacts, a means cooperating with said gear shift operating mechanisms"to release said holding means, means cooperating with said electrical contact means which normally operates in' a progressively forward speed position, to move said means into a reverse speed'position, means to prevent the centrifugal regulated means from advancing to effect shifts to higher gears when reverse gear is engaged, means to move said electrical contact means into-a decreasing speed position, and means cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made.

17. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, a speed controlled means comprising centrifugal means one mounted on the driving shaft and one on the driven shaft and movable bars actuated thereby, manually operated means for regulating the movements of said movable bars, electromagnetic means for operating the clutch release and gear shift mechanisms to effect a particular engagement; circuits to said electromagnetic means and including a source of current, electrical contact means, operated by one of the movable bars, to actuate the electromagnetic means through the respective circuits; a means for holding said electrical contact means in position to make proper contacts to actuate the electromagnetic means to operate the clutch release and proper gear shift mechanisms; a means cooperating with said gear shift mechanisms to release said holding means, said operated electrical contact means normally operating in a progressively forward speed position; means cooperating therewith to move said means into a position to make a reverse speed contact; means to prevent the movable bars from advancing to effect shifts to higher gears when reverse gear is engaged, means to move said electrical control means into a position to make decreasing speed contacts; and means cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made.

18. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, a speed controlled means comprising centrifugal means, one mounted on the driving shaft and one on the driven shaft and movable bars actuated thereby, manually operated means for regulating the movements of said movable bars, electromagnetic means for operating the clutch release and gear shift mechanisms to effect a particular engagement, circuits to said electromagnetic means and including a source of current, electrical contact means operated by one of the movable bars, to actuate the electromagnetic means, through the proper circuit, operating the clutch release mechanism, and to actuate after the clutch has established contact, through the proper circuits,

the electromagnetic means operating the various gear shift mechanisms, a means for holding said electrical contact means in position to make the proper contacts, a means cooperating with said gear shift operating mechanisms to release said holding means normally operating in a progressively forward speed position, means cobperating therewith to move said. means into a position to make a reverse speed contact, means to prevent the centrifugally regulated movable bars from advancing to effect shifts to higher gears when reverse gear is engaged, means to move said-electrical contact means into a position to make decreasing speed contacts, and means cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made.

19. In a device of the character described, the combination of a..driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, a means for automatically actuating said mechanisms comprising speed controlled means; means operated by said speed controlled means for operating the clutch and the several gear shift controlling mechanisms, said operated means normally operating in. a progressively forward speed position, means cooperating therewith, manually actuated, to move said means into a reverse speed position, means to prevent automatically said speed controlled means from advancing to effect shifts to higher gears when reverse gear is engaged,means to automatically move said operated means to a decreasing speed position, means automatically cooperating with the clutch release mechanism to bring gears to neutral before a shift of gears is made, manually operated means to regulate the automatically actuating means so as to vary the rate of automatic gear shift.

20. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch release mechanism, gears and gear shift mechanisms between said shafts, a speed controlled means, electrical contact means operated by said speed controlled means for operating the clutch release and the several gear shift controlling mechanisms, a means for automatically holding said electrical contact means in position to make proper clutch release and gear shift operating mechanisms contacts, a means cooperating with said gear shift operating mechanisms to automatically release said holding means, said operated electrical contact means normally operating in a progressively forward speed position, manually operated means coopcrating therewith to move said means into a reverse speed position, means to prevent automatically the speed controlled means from advancing to effect shifts to higher gears when reverse gear is engaged, automatic means to move said electrical contact means into a decreasing speed position, means cooperating with the clutch release mechanism to automatically bring gears to neutral before a shift of gears is made, manually operated means to regulate the speed controlled means so as to vary the rate of automatic gear shift.

21. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, an automatic speed controlled means, electromagnetic means for automatically operating said clutch release and gear shift mehanisms to effect a operate the clutch release and proper gear shift mechanisms, meanscooperating with said gear shift mechanisms to automatically release said holding means, said operated electrical contact means normally operating in a progressively forward speed'position, manually operated means cooperating therewith to move said means into a position to make a reverse speed contact,

means to prevent automatically the speed con -s trolled means from advancing to effect shifts to higher gears when reverse gear is engaged,

means tomove said electrical contact means into a position to make decreasing speed contacts, means cooperating with the clutch release mechanism to automatically bring gears to neutral before a shift of gears is made, manually operated means to regulate the speed controlled means so as to vary the rate of automatic gear shift.

22. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, an automatic speed controlled means, electromagnetic means for automatically operating said mechanisms to efiect a. release of the clutch or particular gear engagements, circuits to said electromagnetic means and including a source of current, electrical contact means automatically operated by the engine speed and car speed controlled means to actuate the electromagnetic means through the proper circuit operating the clutch release mechanism and to automatically actuate, after the clutch has established contact, through the proper circuits, the electromagnetic means operating the various gear shift mechanisms, a means for automatically holding said electrical contact means in position to make the proper contacts; means cooperating with said gear shift mechanisms to automatically release said holding means; said electrical contact means normally operating in a progressively forward speed position; manually operated means cooperating therewith to move said means into a position to make a reverse speed contact; means to prevent automatically the speed controlled means from advancing to effect shifts to higher gears when reverse gear is engaged; means to automatically move said electrical contact means into a position to make decreasing speed contacts; means cooperating with the clutch release mechanism to automatically bring gears to neutral before a shift of gears is made; manually operated means to regulate the speed controlled means so as to vary the rate of automatic gear shift.

23. In a device of the class described, the combination of a first shaft, a second shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, means for actuating said mechanisms in accordance with the speed of rotation of the first shaft and with the speed of rotation of the second shaft, means cooperating with the clutch release mechanism to bring gears to neutral and means to regulate the actuating means so as to vary the period between gear shifts.

24. In a device of the class described, the combination of a first shaft, a second shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, means for automatically actuating said mechanisms in accordance with the speed of rotation of the first shaft and with the speed of rotation of the second shaft, means cooperating with the clutch release mechanism to bring gears to neutral and means to regulate the automatically actuating means so as to vary the period between automatic gear shifts.

25. In a device of the class described, the combination of'a driving shaft, a driven shaft, a

clutch, clutch releasemechanism, gears and gear shift mechanisms between said shafts, means for actuating said mechanisms in accordance with the speeds of rotation of the-driving shaft and the driven shaft, means cooperating with the clutch release mechanism to bring gears to neutral and means to regulate the actuating means so as to vary the period between gear shifts.

26. In a device of the class described, the combination of a driving shaft, a driven shaft, a clutch, clutch release mechanism, gears and gear shift mechanisms between said shafts, means for automatically actuating said mechanisms in accordance with the speeds of rotation of the driving shaft and the driven shaft, means cooperating with the clutch release mechanism to bring gears to neutral and means to regulate the automatically actuating means so as to vary the period between automatic gear shifts.

27. In combination a first shaft, a second shaft, 'a clutch, clutch release mechanism and speed change mechanisms between said shafts, means comprising a shaft speed controlled apparatus operating electrical contact devices for actuating said clutch, clutch release mechanism and speed change mechanisms in accordance with the speed of rotation of the first shaft and with the speed of rotation of the second shaft and meansto vary the rate of response of the shaft speed controlled apparatus to the shaft speeds so as to vary the rate of operation of the speed change mechanisms.

28. In combination a driving shaft, a driven I shaft, a clutch, clutch release mechanism and speed change mechanisms between said shafts, means comprising a shaft speed controlled apparatus operating electrical contact devices, for actuating said clutch, clutch release mechanism and speed change mechanisms in accordance with the speed of rotation of the driving shaft and with the speed of rotation of the driven shaft, and means to vary the rate of response of the shaft speed controlled apparatus to the shaft speeds so as to vary the rate of operation. of the speed change mechanisms.

29. In combination, a first shaft, a second shaft, a clutch, clutch release mechanism and speed change mechanisms between said shafts, means for automatically successively actuating said clutch, clutch release mechanism and speed speed change mechanisms between said shafts, means comprising shaft speed controlled bars operating electrical contact devices to actuate said clutch, clutch release mechanism and speed change mechanisms in accordance with the speed of rotation of the first shaft and with the speed of rotation of the second shaft and means comprising a slidable bar, extension member thereon and pin cooperating with said shaft speed controlled bars to vary the rate of response of the shaft speed controlled bars to the shaft speeds so as to vary the rate of-operation of the clutch, clutch release mechanism and speed change mechanisms.

31. In combination a driving shaft, a driven shaft, a clutch, clutch release gears and gear shift mechanisms between said shafts, a shaft speed controlled means, means for regulating speed position, means cooperating therewith tomove said means into a reverse speed position,

means to prevent said speed controlled means 10- from advancing to effect shifts to higher gears when reverse gear is engaged, means to move said operated means to a decreasing speed position, and means cooperating with the clutch release mechanism to bring gears to neutral be- 15 fore a shift of gears is made.

WILLIAM L. MoDON'ALD. 

